package cn.zyjblogs.netty.codec2;

import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.util.CharsetUtil;

import java.util.Random;

public class NettyClientHandler extends ChannelInboundHandlerAdapter {
    //当通道就绪就会触发该方法
    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        int i = new Random().nextInt(3);
        DataInfo.MyMessage message = null;
        if (0 == i) {
             message = DataInfo.MyMessage.newBuilder()
                    .setDataType(DataInfo.MyMessage.DataType.StudentType)
                    .setStudent(DataInfo.Student.newBuilder().setId(5).setName("逝水无痕").build()).build();
        } else {
             message = DataInfo.MyMessage.newBuilder()
                    .setDataType(DataInfo.MyMessage.DataType.WorkerType)
                    .setWorker(DataInfo.Worker.newBuilder().setAge(5).setName("worker").build()).build();
        }
        ctx.writeAndFlush(message);
    }

    //当通道有读取事件时触发
    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        ByteBuf buf = (ByteBuf) msg;
        System.out.println("服务器回复的消息: " + buf.toString(CharsetUtil.UTF_8));
        System.out.println("服务器的地址: " + ctx.channel().remoteAddress());
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
        ctx.close();
    }
}
